[The Role of Distinctiveness of Stimulus in Memory Distrust as a Function of Repeated Checking]. / Tekrarli Kontrol Etme Davranisinin Bir Sonucu Olarak Hafizaya Olan Güvenin Azalmasiyla Ilgili Ayirt Edici Uyaranin Rolü.

OBJECTIVE: Recent literature proposes that repeated checking increases familiarity with the material, making recollections less vivid and detailed and promoting distrust in memory. The aim of the current study is to investigate the possible underlying mechanisms of low confidence in memory. METHOD: The Padua Inventory-Washington State University Revision (PI-WSUR) was applied in a cohort of university students. Among the students who completed the PI-WSUR, 84 participants were selected and assigned to low Obsessive-Compulsive Symptomatology (OCS) group or high OCS group according to their PI-WSUR scores. An interactive computer animation was developed to test repeated checking behavior. Participants were randomly assigned to two experimental conditions: "Feedback condition" and "no feedback condition". The participants were all asked to carry out checking rituals on a virtual gas ring. However, half of the participants were given feedback indicating that checking activity was successful and complete and half of the participants were not. RESULTS: While there was no significant difference in terms of memory accuracy, memory detail and memory vividness between feedback condition and no feedback condition, there was a significant difference in terms of memory confidence between two experimental groups. DISCUSSION: Results are discussed in the light of a different explanation offering that the level of distinctiveness of recollections plays crucial role in memory distrust rather than the explanation of low confidence hypothesis.

Executive Functioning in Subtypes of Attention Deficit Hyperactivity Disorder.

INTRODUCTION: This study aims to evaluate executive functions (EF), such as inhibition, planning, working memory, and set shifting, in children with attention deficit hyperactivity disorder (ADHD) by comparing three ADHD subtype groups (ADHD-Inattentive, ADHD-Combined, and ADHD-Comorbid) and a normal control group. METHODS: Participants included 147 children. In total, 111 children were assigned to the ADHD groups of the study. Each child was matched according to the WISC-R Full-Scale IQ-score, sex, and age and was grouped as follows: ADHD-Inattentive group (ADHD-I; n=37), ADHD-Combined (ADHD-C; n=37), ADHD-Comorbid group (ADHD-Comorbid with oppositional defiant disorder and/or conduct disorder; n=37), and control group (n=36). The tests used to assess the children were Conners' Parent and Teacher Rating Scales; Wechsler Intelligence Scale-Revised; Tower of London test; Wisconsin Card Sorting Test; Stroop Color-Word Test, and verbal fluency test. The data were analyzed by one-way ANOVA between subjects for all dependent variables. RESULTS: Children in the ADHD-I group had significantly better performances in verbal working memory and verbal category shifting than children in the ADHD-C group. There was no significant difference between the ADHD-I and ADHD-C groups in terms of inhibition, set shifting, verbal fluency, cognitive flexibility, and planning. The ADHD-Comorbid group displayed more severe impairments in EF measures than the ADHD-C group; however, the severity was not statistically significant. EF performances of children in the control group were similar to children in the ADHD-I group but better than children in the ADHD-C and ADHD-Comorbid groups. CONCLUSION: The outcome of the study indicated that subjects in the ADHD-Comorbid and ADHD-C groups had more severe EF deficits than subjects in the ADHD-I and control groups.

Individual differences as predictors of illicit drug use among Turkish college students.

Although the prevalence of drug use in the young adult population in Turkey is still far below the figures reported for most European Union countries and the United States, there seems to be a noteworthy increase in drug use, especially among high school and college students. The purpose of the present study was to examine the extent of drug use among college students in Turkey and to identify some of the individual-difference variables associated with drug use. Participants were 781 college students. A survey package including (a) measures of sensation seeking-risk taking, self-esteem, affectivity level, global mental health, overall life satisfaction, and the rate and nature of substance use and (b) demographic questions was administered to the participants during regularly held class meetings. A logistic regression analysis revealed that sensation seeking-risk taking, parental education level, smoking, and frequency of alcohol use predicted illicit drug experience. Implications of the findings and limitations of the study are discussed using the context of the study as a framework.

Factors associated with posttraumatic growth among myocardial infarction patients: perceived social support, perception of the event and coping.

Posttraumatic Growth (PTG) is accepted as positive transformations that are a product of struggling with significant stressors such as chronic illness. A model, conceptualized by Schaefer and Moos (Posttraumatic growth: Positive changes in the aftermath of crisis, pp 99-126, 1998), suggests a relative contribution of environmental and individual resources, perception of the event (PE) and coping in the development of PTG. The aim of the present study was to examine the effect of perceived social support (PSS), PE and coping on PTG. This model was tested in a sample of patients with myocardial infarction (MIP, N=148) from various hospitals in Turkey. The structural equation analysis of the model revealed that PSS was significantly related to PTG through the effect of coping. While coping was significantly and directly related to PTG, PE was not. The findings are discussed in the context of the theoretical model with suggestions for future research.